Cardiff University

Displaying 1-26 of 26 results

Sensor networks are driven by the activities of their deployed environment and they have the potential to use data that has previously been sensed in order to classify current sensed data. In this paper, the authors propose the Knowledge-Based Hierarchical Architecture for Sensing (K-HAS), an architecture for Wireless Sensor Networks...

The consideration of Information Assurance & Security (IAS) at the system requirements formulation and design stages has not yet become common practice. Although the importance of the security needs expression by nontechnical experts is intensively discussed, there is still no formalized way to execute this task. Business Process Modeling (BPM)...

Real Exchange Rate (RER) is an important instrument for restoring sustainable economic growth in the small open economy with large export share. RER of Ukrainian currency can be explained within the Real Business Cycle (RBC) framework without any forms of nominal rigidities. Fitting Ukrainian quarterly data for the period of...

Empirical evidence suggests that the Effective Marginal Tax Rate (EMTR) on income from capital has increased considerably in both the United States and the United Kingdom over the period 1982-2005. This evidence contradicts the corporate tax literature which predicts that the EMTR should instead fall over time as a result...

The concept of being ethically and morally responsible, while investing, is not new to our ears. Ethically responsible investment has been in practice since the early civilization of mankind. The concept owes its emergence to the religious believers, values and practices towards investment. Though the practice of responsible investment, by...

This paper uses a simple new-Keynesian model (with and without capital) and calculates multipliers of four types. That is, the authors assume either an increase in government spending or a cut in sales/labor/capital tax that is financed by lump-sum taxes (Ricardian evidence holds). They argue that multipliers of a temporary...

A positive joint two-sector productivity shock causes Rybczynski (1955) and Stolper and Samuelson (1941) effects that release leisure time and initially raises the relative price of human capital investment so as to favor it over goods production. This enables a basic RBC model, modified by having the household sector produce...

This paper investigates the long-term impact of price-level targeting on social welfare in an overlapping generations model in which the young save for old age by investing in productive capital and indexed and nominal government bonds. A key feature of the model is that the extent of bond indexation is...

The authors investigate whether the Fiscal Theory of the Price Level can explain UK inflation in the 1970s. They find that fiscal policy was non-ricardian and money growth entirely endogenous in this period. The implied model of inflation is tested in two ways: for its trend using cointegration analysis and...

Following the rural reform in 1978 a series of agricultural reforms were introduced in China with an aim to create incentives for the farmers to produce more. The nineties' price reform that was aimed at deregulating the agricultural market eventually resulted in a huge drop in agricultural production; this apparently...

Using indirect inference based on a VAR the authors confront US data from 1972 to 2007 with a standard New Keynesian model in which an optimal timeless policy is substituted for a Taylor rule. They find the model explains the data both for the Great Acceleration and the Great Moderation....

Deploying survivable group-oriented applications and enterprise services across network infrastructures incorporating the use of mobile ad hoc edge networks is of interest in military communication scenarios. This requires a more flexible approach to service discovery than conventional solutions typically provide. In this paper, the authors discuss their service discovery design...

This paper analyzes the process of stock market globalization on the basis of two different approaches: The linear one, based on co-integration tests and Vector Error Correction Models (VECM); and the nonlinear approach, based on Singular Spectrum Analysis (SSA) and mutual information tests. While the co-integration tests are based on...

A less well-known empirical finding for the US and UK is a pronounced low frequency negative relationship between inflation and Tobin's q; a normalized market price of capital. This stylized fact is explained within a dynamic stochastic general equilibrium model using three key features: a Lucas and Prescott (1971) physical...

The authors offer a detailed empirical investigation of the European sovereign debt crisis based on the theoretical model by Arghyrou and Tsoukalas (2010). They find evidence of a marked shift in market pricing behaviour from a 'Convergence-trade' model before August 2007 to one driven by macro-fundamentals and international risk thereafter....

With the increasingly ubiquitous nature of Social networks and Cloud computing, users are starting to explore new ways to interact with, and exploit these developing paradigms. Social networks are used to reflect real world relationships that allow users to share information and form connections between one another, essentially creating dynamic...

The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

Integrating heterogeneous data across distributed sources is a major requirement for in silico bioinformatics supporting translational research. For example, genome-scale data on patterns of gene expression in the fruit fly Drosophila melanogaster are widely used in functional genomic studies in many organisms to inform candidate gene selection and validate experimental...

When data from multiple sources (sensors) are processed over a shared distributed computing infrastructure, it is necessary to often provide some Quality of Service (QoS) guarantees to each data stream. Service Level Agreements (SLAs) identify the cost that a user must pay to achieve the required QoS, and a penalty...

This paper presents a framework for developing and executing Java routing protocol implementations within the network simulator NS2. NS2 provides extensive support for developing C++ routing protocols, but has no Java support. This paper describes extensions the authors have made to the AgentJ toolkit that enable routing protocols to be...

This paper will present a review, for a range of building design and performance issues, of the visualization language used in building design and in building simulation, and identify the overlaps and divergences in their use. There is a plethora of techniques available ranging from textual data to graphical representation,...

The purpose of this paper is to provide an overview of strengths and weaknesses of wikis as a tool for collaboration. First authors introduce the concept of wikis. Next authors provide a brief overview of technical characteristics of wikis. They compare wikis to other collaboration tools paying particular attention to...

Dual-process theories of episodic memory state that retrieval is contingent on two independent processes: familiarity and recollection. A variety of studies have reported distinct neural signatures for familiarity and recollection, supporting dual-process theory. One outstanding question is whether these signatures reflect the activation of distinct memory traces or the operation...

Digital Libraries (DLs) provide an important application area for deploying mobile agents, and with the increase in content being made available within such libraries, performance concerns are becoming significant. Current DLs often involve content servers which are geographically distributed, often necessitating information from these servers to be aggregated to answer...

Sensor networks are driven by the activities of their deployed environment and they have the potential to use data that has previously been sensed in order to classify current sensed data. In this paper, the authors propose the Knowledge-Based Hierarchical Architecture for Sensing (K-HAS), an architecture for Wireless Sensor Networks...

This paper will present a review, for a range of building design and performance issues, of the visualization language used in building design and in building simulation, and identify the overlaps and divergences in their use. There is a plethora of techniques available ranging from textual data to graphical representation,...

The purpose of this paper is to provide an overview of strengths and weaknesses of wikis as a tool for collaboration. First authors introduce the concept of wikis. Next authors provide a brief overview of technical characteristics of wikis. They compare wikis to other collaboration tools paying particular attention to...

This paper presents a framework for developing and executing Java routing protocol implementations within the network simulator NS2. NS2 provides extensive support for developing C++ routing protocols, but has no Java support. This paper describes extensions the authors have made to the AgentJ toolkit that enable routing protocols to be...

With the increasingly ubiquitous nature of Social networks and Cloud computing, users are starting to explore new ways to interact with, and exploit these developing paradigms. Social networks are used to reflect real world relationships that allow users to share information and form connections between one another, essentially creating dynamic...

Integrating heterogeneous data across distributed sources is a major requirement for in silico bioinformatics supporting translational research. For example, genome-scale data on patterns of gene expression in the fruit fly Drosophila melanogaster are widely used in functional genomic studies in many organisms to inform candidate gene selection and validate experimental...

This paper analyzes the process of stock market globalization on the basis of two different approaches: The linear one, based on co-integration tests and Vector Error Correction Models (VECM); and the nonlinear approach, based on Singular Spectrum Analysis (SSA) and mutual information tests. While the co-integration tests are based on...

A less well-known empirical finding for the US and UK is a pronounced low frequency negative relationship between inflation and Tobin's q; a normalized market price of capital. This stylized fact is explained within a dynamic stochastic general equilibrium model using three key features: a Lucas and Prescott (1971) physical...

Real Exchange Rate (RER) is an important instrument for restoring sustainable economic growth in the small open economy with large export share. RER of Ukrainian currency can be explained within the Real Business Cycle (RBC) framework without any forms of nominal rigidities. Fitting Ukrainian quarterly data for the period of...

A positive joint two-sector productivity shock causes Rybczynski (1955) and Stolper and Samuelson (1941) effects that release leisure time and initially raises the relative price of human capital investment so as to favor it over goods production. This enables a basic RBC model, modified by having the household sector produce...

This paper investigates the long-term impact of price-level targeting on social welfare in an overlapping generations model in which the young save for old age by investing in productive capital and indexed and nominal government bonds. A key feature of the model is that the extent of bond indexation is...

Following the rural reform in 1978 a series of agricultural reforms were introduced in China with an aim to create incentives for the farmers to produce more. The nineties' price reform that was aimed at deregulating the agricultural market eventually resulted in a huge drop in agricultural production; this apparently...

The authors investigate whether the Fiscal Theory of the Price Level can explain UK inflation in the 1970s. They find that fiscal policy was non-ricardian and money growth entirely endogenous in this period. The implied model of inflation is tested in two ways: for its trend using cointegration analysis and...

The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

Empirical evidence suggests that the Effective Marginal Tax Rate (EMTR) on income from capital has increased considerably in both the United States and the United Kingdom over the period 1982-2005. This evidence contradicts the corporate tax literature which predicts that the EMTR should instead fall over time as a result...

The concept of being ethically and morally responsible, while investing, is not new to our ears. Ethically responsible investment has been in practice since the early civilization of mankind. The concept owes its emergence to the religious believers, values and practices towards investment. Though the practice of responsible investment, by...

The authors offer a detailed empirical investigation of the European sovereign debt crisis based on the theoretical model by Arghyrou and Tsoukalas (2010). They find evidence of a marked shift in market pricing behaviour from a 'Convergence-trade' model before August 2007 to one driven by macro-fundamentals and international risk thereafter....

This paper uses a simple new-Keynesian model (with and without capital) and calculates multipliers of four types. That is, the authors assume either an increase in government spending or a cut in sales/labor/capital tax that is financed by lump-sum taxes (Ricardian evidence holds). They argue that multipliers of a temporary...

Using indirect inference based on a VAR the authors confront US data from 1972 to 2007 with a standard New Keynesian model in which an optimal timeless policy is substituted for a Taylor rule. They find the model explains the data both for the Great Acceleration and the Great Moderation....

The sensor tasking problem in sensor networks involves the representation of users' tasks (user-level tasking) in a form which a sensor network needs to perform required operations (sensor-level tasking) leading to satisfaction of the tasks. The authors analyzed four approaches to Task Representation (TR) in sensor networks: the Open Geospatial...

Deploying survivable group-oriented applications and enterprise services across network infrastructures incorporating the use of mobile ad hoc edge networks is of interest in military communication scenarios. This requires a more flexible approach to service discovery than conventional solutions typically provide. In this paper, the authors discuss their service discovery design...

Digital Libraries (DLs) provide an important application area for deploying mobile agents, and with the increase in content being made available within such libraries, performance concerns are becoming significant. Current DLs often involve content servers which are geographically distributed, often necessitating information from these servers to be aggregated to answer...

Dual-process theories of episodic memory state that retrieval is contingent on two independent processes: familiarity and recollection. A variety of studies have reported distinct neural signatures for familiarity and recollection, supporting dual-process theory. One outstanding question is whether these signatures reflect the activation of distinct memory traces or the operation...

The consideration of Information Assurance & Security (IAS) at the system requirements formulation and design stages has not yet become common practice. Although the importance of the security needs expression by nontechnical experts is intensively discussed, there is still no formalized way to execute this task. Business Process Modeling (BPM)...

When data from multiple sources (sensors) are processed over a shared distributed computing infrastructure, it is necessary to often provide some Quality of Service (QoS) guarantees to each data stream. Service Level Agreements (SLAs) identify the cost that a user must pay to achieve the required QoS, and a penalty...

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